A simple sorting question that has me stumped as to how to do it both
quickly and elegantly.
I have a list of data pairs of the form (distance, time). I want to
sort on the distance element and then remove all pairs where the time
element is out of order with the distance element. For example
((1,1),(2,3),(3,2),(4,4)) --> ((1,1),(4,4)). The actual lists are
much longer.
Thanks in advnace,
Nimrod.